Improvement in means op attaching- artificial teeth to their base-plates



ltnt gime @tutti @Wina EDWARD HALE, JR., OF SI. LOUIS, MISSOURI,ASSIGNOR 'IO HIM- SELF ANDJOSHUA H. ALEXANDER,- OF SAME PLACE.

- Lette/rs Patent No. 92,605, dated J ulg] 13, 1869.

IMPROVEMENT IN MEANS OF ATTACHING- ARTIFICIAL TEETH TO THEIRBASE-PLATES.

The Schedule referred to in these Letters Patent and making part of thesame.

To all whfcm it may-concern:

Bc it known that I, EDWARD HALE, J r., of the city and county of St.Louis, State of Missouri, have invented a new and useful Improvement inAttaching Artificial Teeth to Base-Plates; and that I do hereby declarethe following to be a full and exact description of the saine, referencebeing had to the annexed drawing, and letters marked thereon.

The nature of my invention consists in forming a perforated channelaround the outer edge ot the roof of the base-plate, so it will hold therubber, or other pliable substance to` which the teeth are attached.

Figure l represents a perspective view of the-upper side of themouth-plate, to which the teeth are attached by means of rubber.

a is the ele ation of the channel on the outside or under side of 'thebase-plate.

VFigure 2 represents the side of the plate next the vmouth, and a, insaid figure,shows the channel where rubber is deposited. Y

b shows the holes which form the connection of, rubber in thechannehwith the rubber on the outside and next the teeth, towhich rubberthe teeth are fastened in the ordinary way.4

'lhese small holes"v are provided throughout the channel, as seen in'iigs. 2 and 3.

Figure 3 shows the ridge formed by the depression or channel ou theunder or` outside oi' the plate, that is, the side next the tongue'.

The channel is represented by a, in iig. 2, but shown on the oppositeside of the base-plate.

The channel serves two purposes, one to provide a continuous connectionof rubber on the upper side of the plate, which forms, through the holesin the c hannel, a connection with the rubber next the teeth, and thusprovide a rigid attachment of the teeth to the plate, audit also givesstrength to the plate, by furnishing an inner rim to the same. S

This method of attaching the teeth to the' bascplate is especially goodin connecting teeth to aluminum plate, which cannot be soldered to theteeth, or any other metal in use for dental purposes, thus enabling oneto attach the teeth to the" base-plate by packing with any pliablesubstance, or by running in any fusible metal, and dispensing with.lsolderin all its forms, which, when used, is apt to warp the plate. A

WVhat I claim as new, and for which I ask Letters Patent of the UnitedStates, is-

A base for :artificial teeth, provided with a channel, a, andperforations b, for the reception of the vulcanite, by which the teethand plate are united, snb'- stantially as described.

EDW. HALE, J n.

Witnesses:

WM. M. EocLns, f Guo. W. HALL.

